Hydraulic steering system for full-track vehicles

(19)

(11)

EP 0 040 381 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.04.1982 Bulletin 1982/15

(43)	Date of publication A2:
	25.11.1981 Bulletin 1981/47

(21)	Application number: 81103567

(22)	Date of filing: 11.05.1981

(84)	Designated Contracting States:
	DE FR GB IT SE

(30)

Priority:

19.05.1980 US 151305

(71)	Applicant: Sperry Corporation
	()

(72)	Inventor:
	Taylor, Henry Delano ()

(54)	Hydraulic steering system for full-track vehicles

(57) A hydraulic system for controlling hydraulic motors (10,11) for driving a tracked vehicle which circuit utilizes a single manual control lever (23) to control valve control units (19, 20, 21, 22) to direct pilot pressure.to actuate bi-directional valves (12, 13) that control the direction of movement of the hydraulic motors (10, 11).

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